HELP...6 weeks (we thought) measuring only 4w6d

Ok, so it was a really rough morning. DH and I went to the doctor, thinking it was 6w0d and thinking we might be lucky enought to hear a heart beat. Not only did we not hear a heart beat but we measured at 4W6D. I was so perplexed and confused. We got our positive on Feb 26th...how can the baby only be measuring 4W6D? The math is not making sense to me. The doctor said the sac is in the right place, I am just not as far along as I thought. How is this possible??? I am trying not to freak out but I just don't get it! We are going in for blood work today and Monday. What is going on???

Dont worry too much yet my due date was pushed back a week after my early ultrasound with my first pregnancy and I was sure of my LMP and I had a positive test early as well. are they planing another ultrasound? why did they do one this early?

We were doing the ovulation pee tests. We ovulated on the 13th. Just thought it was really odd to get a positive test on the 25th / 26th if I would have only been at the end of my third week (if we are truly only 4.6 weeks today)...

I guess the math is what is really difficult for me to understand. Maybe I just nee dto stop thinking about it?

I went in today for bleeding and cramps. They thought I was 8 and a half weeks before... but when they did the u/s all they could see was the yolk sack... so they put me at 5 and a half weeks. Its devestating, I know!

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Miranda (30) and DH (31)

Married 8/8/2009Miss Lily, born November 9, 2011Miss Ava- RCsec 1/27/15